package y23.Dec;

public class Test15 {
    public static void main(String[] args) {
        int x = 1;
        for (double i = 1; i < 101; i+=2) {
            System.out.print(x);
            System.out.println(f(i));
            x++;
        }

    }
    public static String f (double x){
        StringBuffer str = new StringBuffer("{");
        str.append((int)x+",");
        str.append(1.0/(2.0+3.0/x)+"}");
        return str.toString();
    }
}
